实现电池反接保护的电路, Circuit Provides
实现电池反接保护的电路, circuit provides reverse-battery protection
a universal problem in battery-operated devices is the threat of damage when an end user (never an engineer) inserts the battery backward. you can avoid damage by inserting a single diode or by using a diode-bridge configuration, but those fixes waste power and reduce the supply voltage by adding one or two diode drops between the battery and the supply rail. an alternative solution not only protects against battery-reversal damage but also automatically corrects the reversal (see the figure below). to eliminate the voltage drops associated with discrete diodes, a low-on-resistance, dpdt (double-pole/double-throw) switch serves as a full-wave rectifier. when you insert the battery with the correct polarity as shown, the upper switch, s1, is in its normally closed state, because its control pin is in its low state. the resulting connection from pin 2 to pin 10 provides a low-impedance path from the battery to the vcc terminal. conversely, the lower switch, s2, closes its normally open terminal (not as shown), because its control pin is in its high state. the resulting path from pin 7 to pin 6 connects the battery's negative terminal to ground.
the esd-protection diodes in ic1 guarantee startup and act as a full-wave rectifier. mosfets internal to the analog switch turn on when the battery voltage exceeds 1v. their less-than-20-nsec turn-on time enables the circuit to maintain normal operation by quickly swapping the leads of a reversed-polarity battery connection. the circuit resistance depends on the battery voltage. when the circuit operates from four nicd, nimh, or alkaline cells, the resistance in each leg of the rectifier is 2.5ω (5ω total). operation with a two-cell battery (2.4v to 3v) yields a total resistance of 10ω. ic1 is rated for operation to 5.5v with 30-ma continuous current, making the circuit useful for cordless phones, portable audio equipment, hand-held electronics, and other light- to medium-current applications. ic1's miniature 10-pin µmax package takes less space than four through-hole signal diodes and is almost as small as two sot-23 dual signal diodes.
figure 1. this circuit senses battery polarity and then quickly connects the load or swaps the battery leads.
Xpedition与Pads Pro之间数据转换的方法
中科蓝讯或推出自主RISC-V内核32位MCU芯片
电动汽车电池测试参数
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实现电池反接保护的电路, Circuit Provides
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a universal problem in battery-operated devices is the threat of damage when an end user (never an engineer) inserts the battery backward. you can avoid damage by inserting a single diode or by using a diode-bridge configuration, but those fixes waste power and reduce the supply voltage by adding one or two diode drops between the battery and the supply rail. an alternative solution not only protects against battery-reversal damage but also automatically corrects the reversal (see the figure below). to eliminate the voltage drops associated with discrete diodes, a low-on-resistance, dpdt (double-pole/double-throw) switch serves as a full-wave rectifier. when you insert the battery with the correct polarity as shown, the upper switch, s1, is in its normally closed state, because its control pin is in its low state. the resulting connection from pin 2 to pin 10 provides a low-impedance path from the battery to the vcc terminal. conversely, the lower switch, s2, closes its normally open terminal (not as shown), because its control pin is in its high state. the resulting path from pin 7 to pin 6 connects the battery's negative terminal to ground.
the esd-protection diodes in ic1 guarantee startup and act as a full-wave rectifier. mosfets internal to the analog switch turn on when the battery voltage exceeds 1v. their less-than-20-nsec turn-on time enables the circuit to maintain normal operation by quickly swapping the leads of a reversed-polarity battery connection. the circuit resistance depends on the battery voltage. when the circuit operates from four nicd, nimh, or alkaline cells, the resistance in each leg of the rectifier is 2.5ω (5ω total). operation with a two-cell battery (2.4v to 3v) yields a total resistance of 10ω. ic1 is rated for operation to 5.5v with 30-ma continuous current, making the circuit useful for cordless phones, portable audio equipment, hand-held electronics, and other light- to medium-current applications. ic1's miniature 10-pin µmax package takes less space than four through-hole signal diodes and is almost as small as two sot-23 dual signal diodes.
figure 1. this circuit senses battery polarity and then quickly connects the load or swaps the battery leads.
Xpedition与Pads Pro之间数据转换的方法
中科蓝讯或推出自主RISC-V内核32位MCU芯片
电动汽车电池测试参数
食用油贴标配套视觉二维码读取，助力实现高效管理
华为重磅发布政府与公共事业行业智能化架构白皮书
实现电池反接保护的电路, Circuit Provides
光伏电站逆变器系统运行状态监测的可视化方法
示波器探头测试线是如何连接到电路的
荣耀FlyPodsPro评测 近身搏击AirPods的优质选择
扫地机器人哪款好？王霏霏力荐浦桑尼克扫地机器人
ADI宣布推出 Power by Linear™的LTM4662
STM32的复用时钟的开启时间
旷视以AI技术助力数字乡村快发展
在半导体行业中，晶圆厚度应该如何检测？
先进封装RDL-first工艺研究进展
关于单片机led显示及驱动方法介绍
方形动力电池的未来趋势将会如何发展？
5G技术下的智能制造的核心是智能工厂
安川伺服应用于泡罩包装加热成型机
GaN-HEMT器件的动态R DSon值测量实验分析